Merge branch 'main' into compile_actions_with_O1

Author: Davknapp

README.md

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 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.7034838.svg)](https://doi.org/10.5281/zenodo.7034838)
-[![t8code tests serial](https://github.com/DLR-AMR/t8code/actions/workflows/tests_t8code_serial.yml/badge.svg)](https://github.com/DLR-AMR/t8code/actions/workflows/tests_t8code_serial.yml)
-[![t8code tests parallel](https://github.com/DLR-AMR/t8code/actions/workflows/tests_t8code_parallel.yml/badge.svg)](https://github.com/DLR-AMR/t8code/actions/workflows/tests_t8code_parallel.yml)
+[![t8code CI](https://github.com/DLR-AMR/t8code/actions/workflows/tests_cmake_testsuite.yml/badge.svg)](https://github.com/DLR-AMR/t8code/actions/workflows/tests_cmake_testsuite.yml)
 
 <p align="center">
   <img width="300px" src=t8code_logo.png>